Bater comes to the role after holding a number of senior HR positions in a variety of companies. Most recently she was HR director for policy, process and resourcing at airport operator BAA.
Bater said: "I am extremely excited to join Celgene as HR director.
"Celgene is a company which has established a dynamic and prosperous environment. I hope to bring my experience to the HR team to help reinforce the great values Celgene holds and ensure a culture where employees will thrive."